I have been playing the game and i hear no Background Music of the game i heard it was well developed by the guy who did elder scrolls but i hear nothing.

Go to the menu and put the music interval slider to lowest.That would basically make the game play music nonstop.I keep it fairly low cause its quite nice and atmospheric..Gw2 is very high in my list of games with good music:)

Alt-tabbing can kill the BGM until the next loading screen (perhaps due to the mute-while-in-background option). Though, frankly, you're not missing much. Nice to hear each piece once, but it gets old *FAST*.